INT 6F - HP Vectra EX-BIOS - "F_IO_CTRL SF_ENABLE_KBD" - UNMASK 8041 OBF INT
	AX = 0404h
	BP = 001Eh (driver ID for V_S8259)
Return: AH = status (see #03744)
	BP,DS destroyed
SeeAlso: AH=00h"HP Vectra",AX=0400h"SF_ENABLE_SVC",AX=0406h"SF_DISABLE_KBD"
SeeAlso: AX=0408h"SF_ENABLE_HPHIL"